How dirty are socks? Can they be washed with underwear?

Cleaning the washing machine
Washing machines easily accumulate dirt and grime. Impurities such as limescale, detergent residue, clothing fibers, and human organic matter can stick between the washing machine tub and inner drum. If not cleaned for a long time, bacteria can easily grow. It is recommended to clean it every 2 to 3 months. You can ask a washing machine repairman to disassemble and clean it, or you can use a tub cleaner.
Dirty clothes should not be left overnight.
Wash dirty clothes as soon as possible after changing them, and it is best not to leave them overnight to prevent bacteria from increasing or dirt from hardening.
Use disinfectant in appropriate amounts
Most detergents are alkylbenzene compounds. Excessive use or insufficient rinsing time can lead to residue, skin irritation, and health problems. To achieve optimal disinfection, use a suitable amount of disinfectant and rinse thoroughly.
Sun drying and sterilization
Ultraviolet rays can kill bacteria, so clothes must be thoroughly dried after washing.
Drying and sterilization
If you encounter humid or rainy weather, those who have the means can wash their clothes with hot water and then dry them in a dryer. Hot water itself can kill bacteria, and drying can thoroughly disinfect the clothes.